SAP Standard Add-on for Infotype 2003

trying to find out if anyone is aware of a standard SAP add-on that would enable you to create short term, ad-hoc working patterns without the need to create a WSR and input it onto IT0007. I've been informed that this was looked at 4 or 5 years ago, and that the add-on was available but needed to be purchased. However, I can't find anything on any documentation